Installing the spark plug of cylinder bank 1

NOTE: The description is for one component only. The procedure is identical for all further components.

Insert spark plug (1) Into special tool 0 496 065 (121 230).
NOTE: TECHNICAL INFORMATION
Do not drop spark plug into spark plug shaft! This can lead to a reduction of the electrode gap and can thus impair smooth running of the engine, especially in idle position.

Courtesy of BMW OF NORTH AMERICA, INC.
Make sure the spark plug does not fall Into the spark plug shaft.
First screw spark plugs into the engine using special tool 0 496 065 (12 1 230) and tighten manually.
NOTE: TECHNICAL INFORMATION
Exclusively swiveling extensions may be used for the reversible ratchet. Rigid mounting tool and variable plug connections with rigid option may not be used; there is a risk that the insulator breaks.

Courtesy of BMW OF NORTH AMERICA, INC.
Tighten spark plugs with a torque wrench, special tool 0496 065 (12 1 230) and extension with joint (1).